Middlings-purifier



(NO Model.)

F. PRINZ.

MIDDLINGS PURIPIBR.

Patented Nov. 21

Nimm

N. FETRs Plmxo-Lilhogmpher. washngxm D. C.

f UNITED STATES PATENT ()FEICE FAUSTIN PRINZ, OF DUNDAS, MINNESOTA;

' IVIIDDLINGSPURIFIER.

SPECIFICATION forming part of Letters Patent No. 267,716, dated November 21, 1882.

To all whom it may concern:

Be it known that I, FAUsrTN PRINZ, a sub- `ject of the Emperor of Germany, and a resident of Dundas, in the county of Bice and State of Minnesota,have invented certain new and useful Improvements in Middlings-Puriliers, ot' which the following is a specification.

This invention relates to machines for purifying middlings; and it, consists in the construction and combination of parts, hereinafter particularly described, and then specifically defined by the claims.

I attain my proposed objects by the use of the mechanism illustrated in the accompanying drawings,`in Which- Figure 1 is a side elevation, partially in section, and Fig. 2 is a cross-sectional View. Fig. 3 is a detail view of the feed-plate; Figs. 4., 5, and 6, enlarged detail views of the wipingstrip 5 Fig. 7, perspective View detached ot' a portion of one end of the double shaker and hopper frames, illustrating the manner ot' constructing them and arranging an air cut-oft'. Fig. 8 is an enlarged detail View of a portion ot' one of the shaker-frames, illustrating the manner of securing the cloth thereto.

A is the frame-work, made in any desired manner, and provided near the! top with a shakenframe, B', supported upon springs a, and adapted to be vibrated by an eccentric, l), as shown. Beneath this shaker-frame B' is a second shaker-frame, B2, and beneath the secersinto the separating apparatus.

oud shaker-frame is a similarly-shaped frame, B3, in which hoppers c' c2 c3 c4 are arranged to convey the middlings after it leaves the shak- All three of the fra-mes B' B2 Bare connected together atsuitable intervals by straps e, so that they will all vibrate together. The lower endsvof the`springs a are connected to hangers d' by bolts d2, passing through slots in the springs, so that the latter may be adjusted higher or lower by a set-screw, d3, to alter the inclination of `the frames B B2 B3. The hangers d are provided with ribs d", adapted to tit into corresponding grooves in the springs, (see small detached perspective view at the right of Fig. 1,) sothat no side motion will be permitted to the springs.

.E is a thin, flat, slightly-inclined plate, at-

Applieation led July 23, 1881.

(No model.)

tached by one end aud its sides to the upper end of the upper shaker-frame, B', beneath the feed-spout F, which thus forms a feed-plate over which the "chop2 is fed in an even, regular stream. Across the frame B', above the lower end of this feed-plate E, is a bar, g", through which a screw, g2, passes and is connected to the lower edge of the plate E, so that by turning the screw up or down the plate E may be drawn up in a curve, as shown in Fig. 3, or allowed to assume a horizontal position to regulate the dow of thechop, as hereinafter shown.

About one-third of the cloth of the upper shaker, B', will be of a rather ne mesh, while the middle third will be of coarser mesh, and

of cloth similar to the upper shaker, B', Whilethe lower ends of the chutes h' h2 h3 are adapted to deliver the middlings that fall through the shaker-fame B' at the proper points upon the different sections of cloth of the lower shaker-trame, B2, as hereinafter explained.

The hoppers c' c2 02 c4 are arranged similar to those shown in my application for patent,

No. 11,546, led June 11, 1880.

` Beneath each of the shakers B' B2 are wooden trough-shaped strips t' ft2, arranged to slide back and forth from side to side of the machine upon rods t`3. (See Figs.l, 4, 5, and 6.) Within these trough-shaped strips smaller dat wooden strips t4 are set and held up against the cloth by springs t5, so that when moved back and forth across the machine the upper strips, t4, will rub against the cloth and remove the adhering dust therefrom.

i is a large sheave or cord-pulley attached to the side of the machine outside of and opposite to the center of the shakers B' B2, and of a size equal to the space between the lower sides of the shaker-frames, so that if a cord, t7, be attached to the center of the trough t" beneath the upper shaker,B', and carried around the sheave t and back to the trough t" beneath IOO the lower shaker, B2, the two lengths of cord will be parallel with each other, as shown in Fig. 2.

'i8 i9 are two smaller sheaves or pulleys attached opposite to the centers of each of the shakers B' B2 and on the other side of the machine irom thesheave i6, while afourth pulley, il, is attached to the machine near the bottom and on a line beneath the pulleys t8 i9, so that the cord t7 may be continued on over the pulley t8 from the upper wiper, down around the pulley 10, and u p over the pulley t, and thence into the lower wiper. By this arrangement it will be seen that if the cords between the pulleys i8 and i9 and pulley'ft1U be pulled up and down the wipers will be drawn back and forth beneath the shakers.

Outside the machine, near the lower part, is a gear-wheel, It', mounted upon a shaft or stud, and adapted to be revolved by a pinion, k2, upon another stud, carrying a ratchet-wheel, k3, the pinion and ratchet being adapted to be revolved together.

7a4 is an arm, pivoted at k6 to the side of the machine, and connected at k7 to one of the lengths of the cord t7 ruiming between the pulleys t8, t9, and @'10, and provided at the other end with a slotted arm,k8.

The gear lo is provided with a crank-pin, k2, which fits into the slot kwin the arm la". When the gear 7c is revolved its pin k2 will not affect the arm 7c while running through the slot;l but (the length of the slot being less than the diameter of the revolution of the crank-pin) when it strikes the upper or lower ends it will raise or lower the arm k2 and leverJtA1 and leave them stationary for some time at both the upward and downward strokes, or while the crank-pin is passing' through the slot icl.

The troughs t" will be so placed that they are upon opposite sides of their respective shaker-frames, as shown, so that if the length of the cord t7 ruiming over the pulleys t8 or t9 be pulled up or down by the arm 7a4 the wipers will be drawn back and forth beneath the cloth. The wipers will be so arranged that they will be drawn out beyond their respective shaker-frames at the end of each stroke,

I and remain outside during the time of their rest, so that they will present no obstruction to the flow ofthe middlings. Small holes will be formed through the bottoms of the troughs 'i' to permit the escape ofthe middlings that may work in beneath the wiping-strips. Rubber tubes or plates, bristles, fur, sheep-skin, or any other suitable material may be used instead of or attached to the wiping-strips i4, if desired. By thus attaching the shaker-frames and wipers to each other, so that they vibrate together, no horizontal friction occurs between the cloth and wipers except in passing from side to side. Hence at least one-halt the wear on the cloth is prevented and the cleaning accomplished in an equally satisfactory manner. This is a very important feature, as it reduces very materially the wear and friction upon the expensive bolting-cloth.

and lowered and set inside the casiugs G G2 between the chutes m2and central open spaces, and provided with cross slats or bars m5, adapted to t up against stops m6 on the chutes m2, so that when the frames H H2 are lowered down open spaces will occur between the cross- -bars m5 and stops m6, through which the air passes, and when the frames H H2 are raised up until the cross-bars m5 come in contact with the stops m6 the air-currents may be entirely cut olf; or by adjusting the frames H H2 up or down the force of the air-currents may be easily regulated and controlled.

Beneath the casings G G2 three conveyers, G3 G4 G5, are arranged, the central lone being connected by hoppers, Ste., with the dust-collectors, while the side onesare connected with the middlingshoppers, by which the middlings and dust may be removed from the machine. Spouts or other devices may be substituted for the conveyers, if desired.

Across the center of each of the cases Gl G2 are dusteolleeting balloons G6 G7 and fans I l2, arranged as in my application for a patent, No. 37,281, tiled July 7, 1881.

Along the edges ofthe shaker-frames B B2 pins n areinserted, (see Fig. 8,) and through the edges of the bolting-cloth binding a2 eyelets are formed, through which and over the pins a a cord, n3, is alternately run and adapted to be drawn taut, and thus stretch the boltingcloth upon the shaker-frames.- This is a very convenient and thorough manner of se- Ioo IIO

curing the cloth, as it not only stretches every part equally, but allows it to be readily and easily tightened when it has become slack, and without removing the shaker-frames from the machine or disiiguring the cloth or frames with tacks or nails.

The spaces between the shaker-frames may be provided with hoods t, (see Fig. 7,) so that the air may be shut off at these points and forced to pass upward through both shakerframes, as under some circumstances this may be found necessary.

Across the frame A, abovethe shaker-frame B', are one or more air-trunks, L L2, provided' with extensions L3 L4, leading downward and into the casings G G2 between the balloons 4G6 G2, and having open lower sides connected to hoods B4 B5 upon the shaker-frame B by loose cloth joints fu v2, so that the vibrations of the shaker-frames and hoods will not affect the trunks. air may be drawn up through the shaker-frames by the same fans, I' l2, that furnish the currents By this arrangement a current of for the dust-collecting ballons Gr6 G", and doing away with the necessity of extra fans being arranged for the shaker-frames.

The first section of the clothupon the -upper shaker-frame, B', from y' to y2, as before described, is covered with bol tin g-cloth of a rather ne mesh, usually about No. 5, while the remaining two sections, from y2 to g3 and from J3 to g4, are covered with cloth of an increasing degree of coarseness, usually about No. 4 and No. 2, respectively, while the lower shakerframe, B2, is similarly covered with sections of cloth g5 ye and g5 yI and y' ya, of an increasing degree ot' eoarseness from the head7 to the tail,77 usually Nos. 6, 5, and 4, the upper section, g5 1 /6, being the finest in the machine.

The chop is fed to the first shaker-frame, B', over the feed-plateV E, which, by means of its delicate adjustment, may be so set with reference to the machine as to feed the chop in a regular, even stream over the whole width of the shakerframe. The middlings is then caused by the rapid vibratory motion of the shaker to flow down over the bolting-cloth, the finer heavier particles sinking to the bottom, the larger lighter particles rising above them, while the fine bran and dust rise to the surface. The particles of middlings finer tha-n the meshes of the first cloth, 1 y2, fall through and are conveyed by the chute h' to the upper end of the first section, y`5 y, of the second shaker, B2, over which it flows, and its particles finer than the cloth upon this section fallv through and are conveyed by the hopper c to the rst set of separating-chutes, m m2 m3 m4. Some ot' the line middlings that should pass through the first section,- y' y2, of the upper section ot' the shaker B' will usually be carried over upon the second section, y2 g3,- and to convey these back upon theiirst section, yyi, of the second shaker, B2, the second chute, h2, is extended at its lower end to overlap the section g5 y", and thus convey all the middlings that fall'through the section y2 g3 upon the section g5 y, where the ne middlings that have i escaped the section y y2 will be sifted through into the hopper c,while the particles too coarse for section g5 y@ will be sifted through section yf" y'. The chute h3 wllvoverlap the section ys y' in the same manner as the chute h2 overlaps the section @/5 ys, to convey the middlings that are ne enough for the section y2 ya, but that have been carried over upon the section ys g4, to section yi y', where they belong. By this arrangement the middlin gs are very evenly graded as to size, so lthat in passing down through the zigzag separating-chutes m' m2 m3 m4 each section ot' chutes will be supplied with middlings of auniform size. Hencea more perfect action of the air-blasts may be secured and a better quality. of middlings. This arrangement also secures a very large extent of cloth-surface without enlarging the machine,

which is a-verydesirable advantage in mills which are cramped for room. The middlings passing down over the zigzag chutes m' m2 m3 dust-collectors and purified. The bran 'and heavy dust are carried over the tail z' of the upper shaker, B', while the very coarse middlings and tailings7 of the second shaker only tind their way to the fourth hopper, c4. The blast of air through the trunks L'L2 will be just sufdcientl to exert a slight lifting effect upon the bran, Ste., and not sudicient to'carry it upward. Thus only the "ery iinest dust will be carried oft' by the trunks into the casings G' G2.

What I claim as new4 isl. In a middlings-puriiier, the combination, with a shaker-frame and a hopper,` of an intermediate feed-plate connected at its sides and one end to the shaker-frame, and at its lower end to an adj usting-screw, whereby the plate is adapted to vibrate with thc shaker-frame and be adjusted from its center to its sides, substantially as and for the purpose set forth.

2. In a middlings-purilier, the combination of a vibrating bolting-clotli frame anda wiping or brushing device ior removing the dust from the cloth, adapted to be reciprocated across the the bolting-cloth at right angles to the ow of the middlings thereover, and to be Vibrated therewith and drawn out beyond the sides of the shaker-frame, substantially as and for the purpose specified.

3. In a middlings-purier, the frames B', B2, and B3, arranged one above the other, connected together, and provided with chutes a-nd hoppers, so that the middlings may pass-from one frame to the next, in combination with the feed-plate E, connected at its sides and one end to the upper shaker-frame and its lower end to an adjusting-screw, and a single shaft and eccentric for vibrating the feed-plate and a series of frames, substantially as set forth.

4. In a middlings-purier, the combination ot a shaker-frame provided with a hood, a casing beneath the shaker-frame; a dust-collecting balloon located therein, a tube or ue having a exible connection to the hood of the shaking-frame and leading therefrom into the balloon-casing, and a fan, located substantially as described, whereby the several parts will operate as set forth.

5.` The combination of the shaker-frame B', trough-shaped strips i', strips t4, springs i5, and rods i3, substantially as set forth.

ICO

IIO

6. The combination, with the shaker-framer tiered vertically adjustable, substantially as set forth.

8. The combination of chutes m m2 m3 m4, adjustable frames H H2 m5, steps m6, dust- 5 collecting ballons CG, and fans l l2, substantially as set forth.

9. The shaker-frame ofa middlings-purifer, provided with pins n', in combination With the bolting-cloth provided with eyelets, and a cord l `passing over the pins and through the eyelets, 10 substantially as and for the purpose set forth. In testimony Whereoflhave hereunto set my hand in the presence of two subscribing Witl messes. l FAUSTIN PRINZ.

. Witnesses:

C. N. WooDWARD, LOUIS FEEsER, Sr. 

